What was she thinking? The chart-topper did not look her best in the bizarre ensemble

Despite the fact she is such a keen ambassador for the brand, it is unlikely that fans will approve of her dire fashion fail.

Fortunately, there are times when she gets it better. Earlier in the day the 22-year old face of Rimmel cosmetics wore an NYC sports jacket over a striped shirt and fitted trousers for a truly masculine look.

Of course, she matched it with a pair of Adidas trainers.

Bushed: Rita has a hard time keeping her eyes open during her outing in West London

In good company: A tired looking Rita is accompanied by her sister Elena

But eagle-eyed fans will have noticed that several of the outfit's pieces had been worn the previous night.

The
fearless fashionista had traded in her skyscraper heels in favour of her Adidas platform trainers, with a backwards baseball cap on her
head.

Toting her
belongings in a fun, furry fuchsia backpack with polka dot detailing by
House of Holland, the pop princess completed her party look with her
trademark pillar box red lipstick and winged eyeliner.

Fearless fashionista: Scoring a home run in the style stakes, the 23-year-old singer looked effortlessly cool in a navy and white leather baseball jacket, which she teamed with a form-fitting striped maxi

Sexy sportswear: Clinging to her showstopping figure to perfection, the Hot Right Now hitmaker's slinky dress added a feminine dimension to her tomboy outfit

Taking a risk: The fearless fashionista traded in her skyscraper heels in favour of a pair of Adidas platform trainers, and wore a backwards baseball cap on her head

Hot Right Now: Toting her belongings in a fun, furry fuchsia backpack with polka dot detailing, the pop princess completed her party look with her trademark pillar box red lipstick and winged eyeliner

The star's fashion night out came before she
was left red-faced during an early-morning appearance on Australian
radio show Kyle and Jackie O on Kiis 1065 on Friday morning.

Rita, who is dating Scottish DJ Calvin Harris, refused to open up when she was asked about her previous relationship with American reality star Rob Kardashian.

'I've got no idea what or who you're talking about,' she said, before giggling down the other end of the phone. She added: 'You put me in the same place last time guys! Onwards and upwards guys.'

Friends in high places: Rita had enjoyed an evening out on the town at the London nightspot, which opened last month, with her showbiz pals

'Honestly, there's a place and time for
everything and people change and evolve. I think time will tell really
and you've just got to keep the train moving forward.'

One thing Rita was happy to discuss was her latest musical collaboration with DJ beau Calvin, who she started dating in May 2013.

Speaking about the pair's upcoming track, I Will Never Let You Down, she said: 'We thought we can't do this, it's just cheesy. It actually turned out really great.

'I just didn’t think I had it. I’d never experienced it before. And I was just like in the wilderness, thinking, “Will it ever happen?’